61694809 has 32 divisors (see below), whose sum is σ = 73903104. Its totient is φ = 50930880.

The previous prime is 61694807. The next prime is 61694821. The reversal of 61694809 is 90849616.

It is not a de Polignac number, because 61694809 - 2¹ = 61694807 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (61694807) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 576534 + ... + 576640.

It is an arithmetic number, because the mean of its divisors is an integer number (2309472).

Almost surely, 2^61694809 is an apocalyptic number.

It is an amenable number.

61694809 is a deficient number, since it is larger than the sum of its proper divisors (12208295).

61694809 is a wasteful number, since it uses less digits than its factorization.

61694809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 61694809 is about 7854.6043184873. The cubic root of 61694809 is about 395.1386769391.

The spelling of 61694809 in words is "sixty-one million, six hundred ninety-four thousand, eight hundred nine".